/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const DATE_TIME_REGEX = /(?:[Eec]{1,6}|G{1,5}|[Qq]{1,5}|(?:[yYur]+|U{1,5})|[ML]{1,5}|d{1,2}|D{1,3}|F{1}|[abB]{1,5}|[hkHK]{1,2}|w{1,2}|W{1}|m{1,2}|s{1,2}|[zZOvVxX]{1,4})(?=([^']*'[^']*')*[^']*$)/g;
/**
 * Parse Date time skeleton into Intl.DateTimeFormatOptions
 * Ref: https://unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
 * @public
 * @param skeleton skeleton string
 */
export function parseDateTimeSkeleton(skeleton) {
    const result = {};
    skeleton.replace(DATE_TIME_REGEX, match => {
        const len = match.length;
        switch (match[0]) {
            // Era
            case 'G':
                result.era = len === 4 ? 'long' : len === 5 ? 'narrow' : 'short';
                break;
            // Year
            case 'y':
                result.year = len === 2 ? '2-digit' : 'numeric';
                break;
            case 'Y':
            case 'u':
            case 'U':
            case 'r':
                throw new RangeError('`Y/u/U/r` (year) patterns are not supported, use `y` instead');
            // Quarter
            case 'q':
            case 'Q':
                throw new RangeError('`q/Q` (quarter) patterns are not supported');
            // Month
            case 'M':
            case 'L':
                result.month = ['numeric', '2-digit', 'short', 'long', 'narrow'][len - 1];
                break;
            // Week
            case 'w':
            case 'W':
                throw new RangeError('`w/W` (week) patterns are not supported');
            case 'd':
                result.day = ['numeric', '2-digit'][len - 1];
                break;
            case 'D':
            case 'F':
            case 'g':
                throw new RangeError('`D/F/g` (day) patterns are not supported, use `d` instead');
            // Weekday
            case 'E':
                result.weekday = len === 4 ? 'short' : len === 5 ? 'narrow' : 'short';
                break;
            case 'e':
                if (len < 4) {
                    throw new RangeError('`e..eee` (weekday) patterns are not supported');
                }
                result.weekday = ['short', 'long', 'narrow', 'short'][len - 4];
                break;
            case 'c':
                if (len < 4) {
                    throw new RangeError('`c..ccc` (weekday) patterns are not supported');
                }
                result.weekday = ['short', 'long', 'narrow', 'short'][len - 4];
                break;
            // Period
            case 'a': // AM, PM
                result.hour12 = true;
                break;
            case 'b': // am, pm, noon, midnight
            case 'B': // flexible day periods
                throw new RangeError('`b/B` (period) patterns are not supported, use `a` instead');
            // Hour
            case 'h':
                result.hourCycle = 'h12';
                result.hour = ['numeric', '2-digit'][len - 1];
                break;
            case 'H':
                result.hourCycle = 'h23';
                result.hour = ['numeric', '2-digit'][len - 1];
                break;
            case 'K':
                result.hourCycle = 'h11';
                result.hour = ['numeric', '2-digit'][len - 1];
                break;
            case 'k':
                result.hourCycle = 'h24';
                result.hour = ['numeric', '2-digit'][len - 1];
                break;
            case 'j':
            case 'J':
            case 'C':
                throw new RangeError('`j/J/C` (hour) patterns are not supported, use `h/H/K/k` instead');
            // Minute
            case 'm':
                result.minute = ['numeric', '2-digit'][len - 1];
                break;
            // Second
            case 's':
                result.second = ['numeric', '2-digit'][len - 1];
                break;
            case 'S':
            case 'A':
                throw new RangeError('`S/A` (second) pattenrs are not supported, use `s` instead');
            // Zone
            case 'z': // 1..3, 4: specific non-location format
                result.timeZoneName = len < 4 ? 'short' : 'long';
                break;
            case 'Z': // 1..3, 4, 5: The ISO8601 varios formats
            case 'O': // 1, 4: miliseconds in day short, long
            case 'v': // 1, 4: generic non-location format
            case 'V': // 1, 2, 3, 4: time zone ID or city
            case 'X': // 1, 2, 3, 4: The ISO8601 varios formats
            case 'x': // 1, 2, 3, 4: The ISO8601 varios formats
                throw new RangeError('`Z/O/v/V/X/x` (timeZone) pattenrs are not supported, use `z` instead');
        }
        return '';
    });
    return result;
}
function icuUnitToEcma(unit) {
    return unit.replace(/^(.*?)-/, '');
}
const FRACTION_PRECISION_REGEX = /^\.(?:(0+)(\+|#+)?)?$/g;
const SIGNIFICANT_PRECISION_REGEX = /^(@+)?(\+|#+)?$/g;
function parseSignificantPrecision(str) {
    const result = {};
    str.replace(SIGNIFICANT_PRECISION_REGEX, function (_, g1, g2) {
        // @@@ case
        if (typeof g2 !== 'string') {
            result.minimumSignificantDigits = g1.length;
            result.maximumSignificantDigits = g1.length;
        }
        // @@@+ case
        else if (g2 === '+') {
            result.minimumSignificantDigits = g1.length;
        }
        // .### case
        else if (g1[0] === '#') {
            result.maximumSignificantDigits = g1.length;
        }
        // .@@## or .@@@ case
        else {
            result.minimumSignificantDigits = g1.length;
            result.maximumSignificantDigits =
                g1.length + (typeof g2 === 'string' ? g2.length : 0);
        }
        return '';
    });
    return result;
}
function parseSign(str) {
    switch (str) {
        case 'sign-auto':
            return {
                signDisplay: 'auto',
            };
        case 'sign-accounting':
            return {
                currencySign: 'accounting',
            };
        case 'sign-always':
            return {
                signDisplay: 'always',
            };
        case 'sign-accounting-always':
            return {
                signDisplay: 'always',
                currencySign: 'accounting',
            };
        case 'sign-except-zero':
            return {
                signDisplay: 'exceptZero',
            };
        case 'sign-accounting-except-zero':
            return {
                signDisplay: 'exceptZero',
                currencySign: 'accounting',
            };
        case 'sign-never':
            return {
                signDisplay: 'never',
            };
    }
}
function parseNotationOptions(opt) {
    const result = {};
    const signOpts = parseSign(opt);
    if (signOpts) {
        return signOpts;
    }
    return result;
}
/**
 * https://github.com/unicode-org/icu/blob/master/docs/userguide/format_parse/numbers/skeletons.md#skeleton-stems-and-options
 */
export function convertNumberSkeletonToNumberFormatOptions(tokens) {
    let result = {};
    for (const token of tokens) {
        switch (token.stem) {
            case 'percent':
                result.style = 'percent';
                continue;
            case 'currency':
                result.style = 'currency';
                result.currency = token.options[0];
                continue;
            case 'group-off':
                result.useGrouping = false;
                continue;
            case 'precision-integer':
                result.maximumFractionDigits = 0;
                continue;
            case 'measure-unit':
                result.style = 'unit';
                result.unit = icuUnitToEcma(token.options[0]);
                continue;
            case 'compact-short':
                result.notation = 'compact';
                result.compactDisplay = 'short';
                continue;
            case 'compact-long':
                result.notation = 'compact';
                result.compactDisplay = 'long';
                continue;
            case 'scientific':
                result = Object.assign(Object.assign(Object.assign({}, result), { notation: 'scientific' }), token.options.reduce((all, opt) => (Object.assign(Object.assign({}, all), parseNotationOptions(opt))), {}));
                continue;
            case 'engineering':
                result = Object.assign(Object.assign(Object.assign({}, result), { notation: 'engineering' }), token.options.reduce((all, opt) => (Object.assign(Object.assign({}, all), parseNotationOptions(opt))), {}));
                continue;
            case 'notation-simple':
                result.notation = 'standard';
                continue;
            // https://github.com/unicode-org/icu/blob/master/icu4c/source/i18n/unicode/unumberformatter.h
            case 'unit-width-narrow':
                result.currencyDisplay = 'narrowSymbol';
                result.unitDisplay = 'narrow';
                continue;
            case 'unit-width-short':
                result.currencyDisplay = 'code';
                result.unitDisplay = 'short';
                continue;
            case 'unit-width-full-name':
                result.currencyDisplay = 'name';
                result.unitDisplay = 'long';
                continue;
            case 'unit-width-iso-code':
                result.currencyDisplay = 'symbol';
                continue;
        }
        // Precision
        // https://github.com/unicode-org/icu/blob/master/docs/userguide/format_parse/numbers/skeletons.md#fraction-precision
        if (FRACTION_PRECISION_REGEX.test(token.stem)) {
            if (token.options.length > 1) {
                throw new RangeError('Fraction-precision stems only accept a single optional option');
            }
            token.stem.replace(FRACTION_PRECISION_REGEX, function (match, g1, g2) {
                // precision-integer case
                if (match === '.') {
                    result.maximumFractionDigits = 0;
                }
                // .000+ case
                else if (g2 === '+') {
                    result.minimumFractionDigits = g2.length;
                }
                // .### case
                else if (g1[0] === '#') {
                    result.maximumFractionDigits = g1.length;
                }
                // .00## or .000 case
                else {
                    result.minimumFractionDigits = g1.length;
                    result.maximumFractionDigits =
                        g1.length + (typeof g2 === 'string' ? g2.length : 0);
                }
                return '';
            });
            if (token.options.length) {
                result = Object.assign(Object.assign({}, result), parseSignificantPrecision(token.options[0]));
            }
            continue;
        }
        if (SIGNIFICANT_PRECISION_REGEX.test(token.stem)) {
            result = Object.assign(Object.assign({}, result), parseSignificantPrecision(token.stem));
            continue;
        }
        const signOpts = parseSign(token.stem);
        if (signOpts) {
            result = Object.assign(Object.assign({}, result), signOpts);
        }
    }
    return result;
}
